Write and test the following function:

def footage$\_$to$\_$acres$($square$\_$feet$)$:

$"""$

$-------------------------------------------------------$

Converts square footage to acres.

Use: acres $=$ footage$\_$to$\_$acres$($square$\_$feet$)$

$-------------------------------------------------------$

Parameters:

square$\_$feet $-$ area in square feet $($float $>=0)$

Returns:

acres $-$ square$\_$footage in acres $($float$)$

$------------------------------------------------------$

$"""$

Add the function to a PyDev module named functions.py$.$ Test it from $.$

There are $43,560$ square feet per acre. Define this value as a global constant outside of the function in functions.py$.$

The function does not ask for input and does no printing $-$ that is done by your test program.

Sample testing: